I guess I'll comment.
Because I ruin everything, it was my channel (#tf2.mix.nahl) that was the first to leave GameSurge and move to GeeksIRC - http://teamfortress.tv/forum/thread/13907-changes-in-tf2-mix-nahl. In short, we moved because I got tired of patching the issues we had with GameSurge, and we needed a solution.
We were beset by trolls. There were periods where we'd get a single person trying to enter the channel through 20-30 proxies within an hour. Initially, we had to manually ban these people on each of their proxies. Eventually, I had blindsight write a bot to do it, which was later implemented in #tf2.pug.nahl (this is the bot smakers mentioned). Anyone who joined as part of a proxy network was automatically temp banned. This greatly reduced the porn spam and racial slurs our channel suffered.
The thing was, GameSurge's temp ban lists are kind of derpy. Depending on how someone is banned on GameSurge, they can go on one of three (? I ran my channel for a year and was still kind of mystified about the various banlists, despite talking to GameSurge opers multiple times) banlists. The banlist our bot was temp banning to was full. The banlist most of our admins were banning to was also full. You might ask "why were you banning so many people?", to which my reasonable answer would be "because I'm hitler" that we weren't. Most of the new bans - especially new permanent bans - were alternate IPs for existing banned players (due to them moving, going to and from school, etc).
When considering switching networks I did actually look at QuakeNet - after all, "they have euros". The fact was, I was extremely dissatisfied with the situation QuakeNet offered. Our problem was maintaining our banlists, but QuakeNet had a really really messy ban system - potentially, banning someone by IP would result in banning their entire dorm, or entire campus. This wasn't an acceptable solution.
When blindsight offered me GeeksIRC as a solution, I jumped at it - they offered me the services I wanted, were willing to customize them to running a TF2 channel, and had considerable ban flexibility. I was incredibly willing to consider them as an option without the coercion cinq implies. Any stalling on the move on my part came from wanting to minimize how many different changes happened in my channel, so I waited for our new bot (which wouldn't work on QuakeNet without a massive rewrite, at which point it would run considerably slower than it does now) before moving.
I knew #tf2mix was thinking about moving, but didn't know how committed they were to QuakeNet. I new #tf2.pug.nahl was also going to move, but was similarly waiting to switch bots - actually to a modified version of the bot #tf2.mix.nahl currently uses (after we get some playtesting in), which again, wouldn't work on QuakeNet.
I have no desire to divide the community. However, I wonder if dividing the North American 6s and Highlander communities isn't worse than dividing the European and North American 6s communities. That #tf2mix and #tf2scrim are now moving independently of #tf2.pug.na, #tf2.mix.nahl and #tf2.pug.nahl worries me.
For what it's worth, the euros are welcome to come to GeeksIRC - the network opers, in my experience, are remarkably responsive, the network seems to be easy for any existing bots to adapt to, and channel registration is free and easy. GeeksIRC even has a european node, no people don't have to worry about latency to the network.